美认定宇航员滞留为最高等级事故

Core Viewpoint - The investigation report by NASA classifies the incident involving Boeing's "Starliner" crewed test flight as a Class A accident, the highest severity level, due to astronaut stranding at the International Space Station caused by spacecraft malfunction [1] Group 1: Accident Classification - NASA categorizes the incident as a Class A accident, which includes scenarios leading to death or permanent disability, direct property loss exceeding $2 million, destruction of crewed spacecraft, or uncontrolled flight in unexpected conditions [1] - The report highlights that hardware failures, certification issues, and leadership errors contributed to the risk conditions that did not meet NASA's crewed spaceflight safety standards [1] Group 2: Technical Issues and Future Actions - Technical problems with the "Starliner" were particularly evident during the docking process with the International Space Station [1] - NASA plans to implement corrective measures based on the investigation findings to ensure the safety of future "Starliner" missions and other crewed projects [1] Group 3: Mission Timeline and Outcomes - The "Starliner" was scheduled to carry two American astronauts to the International Space Station on June 5, 2024, with an expected stay of 8 to 14 days [1] - Due to propulsion failures and helium leaks, NASA decided to return the "Starliner" uncrewed in September 2024, resulting in the astronauts remaining at the ISS until their return on SpaceX's "Dragon" spacecraft in March 2025 [1] - An independent project investigation team was established by NASA in February 2025 to examine the technical issues related to the test flight, with the report completed in November 2025 [1]